GENERAL SYSTEMATIC BACTERIOLOGY 157 



fonnatioii from carbohydrates, which when motile, have peritrichous 

 flagella, which are not obUgate anaerobes and which do not typically 

 form alkalies by splitting of proteins. The genus Denitrobacterium, 

 characterized by large denitrifying powers, does not strictly belong in 

 this family, but is intermediate between the other genera and the 

 family Luminihacteriaceae of the preceding order Cephalotrichinae. 



The genera of the family Acidobacteriaceae as recognized by Orla- 

 Jensen may be differentiated by the following key : 



A. Primarily denitrifying rods. Genus 1. Denitrobacterium. 



B. Not primarily denitrifiers. 



I. Cells rod shaped. 



a. Producing succinic acid. Colon group. 



Genus 2. Bacterium. 



b. Producing lactic acid. Genus 4. Caseobacterium. 



II. Cells spherical. 



a. Producing propionic acid. 



Genus 3. Propionibacterium. 



b. Not producing propionic acid. 



1. Cells in chains. Genus 5. Streptococcus. 



2. Cells irregularly arranged. 



Genus 6. Micrococcus. 



3. Cells in packets. Genus 7. Sarcina. 



Orla-Jensen (p. 340) suggests that the additional genera Sporosarcina 

 for sarcina forms that develop spores and Peptonococcus for the lactic 

 acid bacteria that form peptones from proteins should be added. 



The name apparently has not been used by subsequent writers. 



It may be noted that the family name Acidobacteriaceae is not derived 

 from any of the component genera, and is therefore incorrect in form, 

 and may be regarded as invalid. 



Actinobacille. A casual name given by Ligni^res and Spitz 

 (1904, p. 454) to a group of bacteria related to Actinomyces. The 

 French designation actinobacille was used apparently as a translation 

 of the original Spanish term actinobacilo {q.v.) by Lignieres and Spitz 

 (1902, p. 169). This is the form later designated by the generic name 

 Actinobacillus (q.v.) by Brumpt (1910, p. 849). 



The description given by Lignieres and Spitz is as follows: 



L'agent specifique de I'actinophytose h actinobacille se presente, dans les 

 cultures sous I'aspect d'un microbe parfois k peine plus gros que celui du cholera 

 des poules. Dans les premieres cultures, il est nettement bacillaire;plus tard, 

 surtout sus gelose, il affecte la forme du cocco-bacille ou de diplocoque; dans 

 les cultures en bouillon serum, on observe I'aspect streptobacillaire. Enfin, 



